ML19322D500
| ML19322D500 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 01/11/1980 |
| From: | Jay Collins NRC - TMI-2 OPERATIONS/SUPPORT TASK FORCE |
| To: | Vollmer R NRC - TMI-2 OPERATIONS/SUPPORT TASK FORCE |
| References | |
| CON-NRC-TMI-80-001, CON-NRC-TMI-80-1 NUDOCS 8002130652 | |
| Download: ML19322D500 (1) | |
Text
fn j-v R K4G UNITED STATES l
,o, NUCLEAR REGULATORY COMMiss!ON f,(
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WASHINGTON, D. C. 20555 k,b 5 ['
f January 11, 1980 NRC/TMI-80-001 MEh0RANDUM FOR:
R. H. Vollmer, Director, TMI Support i
FROM:
J. T. Collins, Deputy Director, TMI Support
SUBJECT:
rep 0RTED DISCOVERY OF FISSION PRODUCTS IN tiUD SAMPLES FROM RIVER NEAR TMI
REFERENCES:
(1) Telegram, AMEMBASSY TOKYO to SECSTATE WASHDC, same subject, dated 26 Dec 79.
(2) Hetropolitan Edison Company, Radiological Environmental Monitoring Report, 1977 Annual Report.
(3) Metropolitan Edison Company, Radiological Environmental ilonitoring Report, 1978 Annual Report.
Reference 1 reported that Dr. Nobuya Ogino had disclosed the discovery of Cesium-134 in mud samples taken on October 27, 1979, from areas adjacent to the Three 1111e Island site. Cesium-134 concentrations of 105 and 95 picocuries per kilogram of mud were reportedly determined by two Japanese schools.
Cesium-134 is a fission product with a half-life of 2.06 years.
The isotope is introduced into the environment from a variety of sources, including weapons tes'ing fallout and routine power reactor liquid dischcrges. Scdimen. concentrations of Cesium-134 in tne hundreds of picocuries per kilogram are considered insignificant health hazards.
References 2 and 3 report the results of the Three Nile Island environmental sampling program for the years 1977 and 1978. A review of these reports, which are available in the public document room, indicates Cesium-134 concentrations in sediment samples were found prior to the accident last year at levels comparable to thos. reportedly found by Dr. Ogino.
Based on these facts, Dr. Ogino's repc.ted results would be expected and provide no new information not already reported to the public.
!a,/
/ J. T. Collins Deputy Director THI Support g 0 0 213 0 6 5 P
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